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cyan · cool

#4b686c

a dark, soft cyan · cool · closest name: Dark Slate Gray

Token name suggestion: Dusk Lagoon

RGB
75, 104, 108
HSL
187°, 18%, 36%
CMYK
31, 4, 0, 58
Luminance
0.1248

#4b686c is a dark soft cyan, 187° on the wheel and 71/100 on the cool side. Put white text on it (6.01:1). As text it scores 6.01:1 on white — safe at any size. Nearest name is Dark Slate Gray, nearest Tailwind family is gray.

hsl(187 18% 36%)rgb(75 104 108)Base step 800AA inkCool

At a glance

Every number on this page in one read: what #4b686c is made of, how bright it looks, and which way it leans.

Hex
#4b686c
Hue
187°
cyan
Saturation
18%
soft
Lightness
36%
dark
Brightness
42%
HSV value
Perceived
38%
weighted brightness
Luminance
0.1248
WCAG relative
Temperature
Cool
71/100 cool
Color family
Cyan
Tone
Soft
Best ink
White
6.01:1
Closest name
Dark Slate Gray
ΔE2000 9.4
Chroma
11.1
LCH, 0–130ish
OKLCH L
0.496
perceptual lightness
Tailwind
gray
500 · ΔE 12.8
Web-safe
#336666
nearest of 216
Where it sits
Hue187° of 360°
Saturation18%
Lightness36%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #4b686c.

Temperature
Warm ← → Cool71% cool

Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red12%
Green79%
Blue9%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#4b686c
HEX (8-digit)#4b686cff
RGBrgb(75, 104, 108)
RGBArgba(75, 104, 108, 1)
HSLhsl(187, 18%, 36%)
HSV / HSBhsv(187, 31%, 42%)
HWBhwb(187 29% 58%)
CMYKcmyk(31%, 4%, 0%, 58%)
LABlab(42.0 -9.5 -5.7)
LCHlch(42.0 11.1 210.9)
OKLCHoklch(0.496 0.035 206.7)
XYZ (D65)xyz(10.56, 12.48, 16.04)
Decimal4941932
Display P3color(display-p3 0.294 0.408 0.424)
Web-safe#336666

Copy-ready code

every platformclick to select
/* CSS */
color: #4b686c;
background-color: #4b686c;
/* CSS custom property */
--brand: #4b686c;
/* Tailwind (arbitrary) */
class="text-[#4b686c] bg-[#4b686c]"
/* SCSS */
$brand: #4b686c;
/* SwiftUI */
Color(red: 0.294, green: 0.408, blue: 0.424)
/* UIKit */
UIColor(red: 0.294, green: 0.408, blue: 0.424, alpha: 1)
/* Android XML */
<color name="brand">#4B686C</color>
/* Android Compose */
Color(0xFF4B686C)
/* Flutter */
Color(0xFF4B686C)
/* Python / OpenCV (BGR) */
(108, 104, 75)
/* Python / PIL (RGB) */
(75, 104, 108)
/* Java AWT */
new Color(75, 104, 108)
/* .NET */
Color.FromArgb(255, 75, 104, 108)
/* OpenGL / Unity (0–1) */
(0.2941f, 0.4078f, 0.4235f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{75,104,108}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #4b686c 85%, white);
border-color: color-mix(in oklab, #4b686c 40%, transparent);
/* theme-aware in one line */
color: light-dark(#34484B, #DBE5E6);
/* relative colour syntax */
--hover: hsl(from #4b686c h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F6F8F8;
  --brand-100: #EEF1F2;
  --brand-200: #D9E2E3;
  --brand-300: #BDCFD1;
  --brand-400: #9CB6BA;
  --brand-500: #7B9EA3;
  --brand-600: #648B90;
  --brand-700: #547478;
  --brand-800: #4b686c;
  --brand-900: #334547;
  --brand-950: #202B2D;
  --brand: #4b686c;
  --brand-ink: #ffffff;
  --brand-surface: #F6F8F9;
  --brand-border: #CFDCDE;
  --brand-hover: #3C5457;
  --brand-pressed: #2E3F42;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #172021;
    --brand-ink: #DBE5E6;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F6F8F8',
        100: '#EEF1F2',
        200: '#D9E2E3',
        300: '#BDCFD1',
        400: '#9CB6BA',
        500: '#7B9EA3',
        600: '#648B90',
        700: '#547478',
        800: '#4b686c',
        900: '#334547',
        950: '#202B2D',
        DEFAULT: '#4b686c',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F6F8F8,
  '100': #EEF1F2,
  '200': #D9E2E3,
  '300': #BDCFD1,
  '400': #9CB6BA,
  '500': #7B9EA3,
  '600': #648B90,
  '700': #547478,
  '800': #4b686c,
  '900': #334547,
  '950': #202B2D,
);
$brand-base: #4b686c;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F6F8F8", "$type": "color" },
      "100": { "$value": "#EEF1F2", "$type": "color" },
      "200": { "$value": "#D9E2E3", "$type": "color" },
      "300": { "$value": "#BDCFD1", "$type": "color" },
      "400": { "$value": "#9CB6BA", "$type": "color" },
      "500": { "$value": "#7B9EA3", "$type": "color" },
      "600": { "$value": "#648B90", "$type": "color" },
      "700": { "$value": "#547478", "$type": "color" },
      "800": { "$value": "#4b686c", "$type": "color" },
      "900": { "$value": "#334547", "$type": "color" },
      "950": { "$value": "#202B2D", "$type": "color" }
    },
    "brandInk": { "$value": "#ffffff", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#ffffff on #4b686c · 6.01:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 6.01:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.50:1
AA fail · AA large pass · AAA fail
Reading the other direction: #4b686c as text scores 6.01:1 on white and 3.50:1 on black.
Best tinted ink on it, if plain black or white feels flat: #F0F4F5 at 5.42:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#4b686c · 6.01:1
AA on whitealready passes
#4b686c
The quick fox
#435C60 · 7.15:1
AAA on white−4% L
#435C60
The quick fox
#5A7C81 · 4.63:1
AA on black+7% L
#5A7C81
The quick fox
#779CA1 · 7.05:1
AAA on black+19% L
#779CA1

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #4B686C is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#4b686c on white: 6.01:1
AA ✓ pass · AA-large · AAA
Aa
#4b686c on black: 3.50:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #4b686c as text on that neutral, and that neutral as text on #4b686c.

NeutralRatioBoth directions
White6.01:1AaAa
Slate 505.74:1AaAa
Slate 1005.48:1AaAa
Slate 2004.87:1AaAa
Slate 3004.05:1AaAa
Slate 4002.34:1AaAa
Slate 5001.26:1AaAa
Slate 6001.26:1AaAa
Slate 7001.72:1AaAa
Slate 8002.44:1AaAa
Slate 9002.97:1AaAa
Black3.50:1AaAa
Colour vision deficiency
true color
protanopia · #63666C
deuteranopia · #5E616C
tritanopia · #406A69

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #4b686c is pinned to step 800; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F6F8F8
#EEF1F2
#D9E2E3
#BDCFD1
#9CB6BA
#7B9EA3
#648B90
#547478
#4b686c
#334547
#202B2D
Base = 800Lightest = 50 · #F6F8F8Darkest = 950 · #202B2DText step on white = 700
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.009 206.7);
  --brand-100: oklch(0.94 0.014 206.7);
  --brand-200: oklch(0.88 0.021 206.7);
  --brand-300: oklch(0.80 0.027 206.7);
  --brand-400: oklch(0.72 0.032 206.7);
  --brand-500: oklch(0.64 0.035 206.7);
  --brand-600: oklch(0.56 0.035 206.7);
  --brand-700: oklch(0.48 0.032 206.7);
  --brand-800: oklch(0.40 0.029 206.7);
  --brand-900: oklch(0.32 0.024 206.7);
  --brand-950: oklch(0.24 0.019 206.7);
}

Colors that work with #4b686c

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#ffffff
White wins here
Surface#F6F8F9
Tinted page background
Border#CFDCDE
Hairlines and dividers
Muted text#5E8287
Captions on the surface
Accent#70474D
Second voice, not a rival
Dark variant#34484B
Hover, pressed, headers
Light variant#F0F4F5
Selected rows, tints
Dark surface#172021
Dark-mode background
Hover#3C5457
One step down in lightness
Pressed#2E3F42
Two steps down
Disabled#80A2A7
Chroma pulled out
Focus ring#497B82
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #4b686c

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Body text and links on white
  • Charts, tags and secondary surfaces
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Black text placed on it
  • Thin strokes and 1px borders — they disappear on light UI
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Any size
Safe as a fill behind white type
Yes
Safe as a 1px border on white
Yes

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

cleantechnicalfreshclinical

Cyan reads as water, air and infrastructure: cool, hygienic, engineered.

The muted chroma softens the association — it reads considered rather than loud, which suits long-form and data-heavy screens. The low lightness adds weight and formality.

Worth knowing

At high lightness it disappears into white surfaces and thin strokes vanish entirely.

Reads as
  • FormalityHigh
  • EnergyMedium
  • Weight64/100
  • TemperatureCool
  • ApproachabilityReserved

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#6C4F4B
Analogous left#4B6C60
Analogous right#4B586C
Split-complement 1#6C4B58
Split-complement 2#6C604B
Triadic 1#6C4B68
Triadic 2#686C4B
Tetradic#604B6C
On the wheel
Base+30°−30°+120°+240°+180°187°

#4b686c sits at 187°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red29.4%
Green40.8%
Blue42.4%
R · 0–255
75
0x4b
G · 0–255
104
0x68
B · 0–255
108
0x6c

CMYK percentages

Cyan30.6%
Magenta3.7%
Yellow0.0%
Key (black)57.6%

Total ink coverage is 92%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#4b686c text on a black background

contrast 3.50:1

Card sample

#4b686c text on a white background

contrast 6.01:1

Card sample

#4b686c on grey

5.48:1

#4b686c on its own surface

5.64:1

#4b686c on its dark surface

2.76:1

CSS3 live lab

Text font color

The quick brown fox

color: #4b686c;
Background color
Panel with #4b686c background
background-color: #4b686c;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #4b686c;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(75, 104, 108, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(75, 104, 108, 0.45);
Border & gradient
Gradient panel
border: 3px solid #4b686c;
background: linear-gradient(135deg, #4b686c, #4B526C);
Gradient text

Gradient headline

background: linear-gradient(90deg, #4b686c, #4C4B6C);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #4b686c;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #4b686c;
caret-color: #4b686c;
Left rule
Pull quote or callout
border-left: 4px solid #4b686c;
Ring + tint
Selected chip
background: #F0F4F5;
box-shadow: inset 0 0 0 2px #4b686c;
Conic badge
68%
background: conic-gradient(#4b686c 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #4b686c over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(75, 104, 108, 0.5)
rgb(75 104 108 / 50%)
#4b686c80
hsl(187 18% 36% / 50%)
color-mix(in srgb, #4b686c 50%, transparent)
Alpha8-digit hexFlat on white
10%#4b686c1a#EDF0F0
20%#4b686c33#DBE1E2
40%#4b686c66#B7C3C4
60%#4b686c99#93A4A7
80%#4b686ccc#6F8689

Gradients from #4b686c

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #648B90, #4b686c 45%, #34484B);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #4b686c, #3F425A);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #4b686c, #6C4F4B);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #74999F 0%, #4b686c 45%, #34484B 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F6F8F9, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #608A77 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #58637E 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #34484B 0%, transparent 65%), #4b686c;

Monochromatic scale

Palettes built from #4b686c

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#4b686c in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
TechnologyTravelHealthcareMedia
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Converts to four-color process without much drama. Proof it anyway.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Too dim on dark surfaces at 3.50:1 — lift it to #5A7C81 for body text, or reserve it for fills.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#4b686c, answered

What color is #4b686c?

#4b686c is a dark soft cyan, closest to Dark Slate Gray (ΔE2000 9.4). It sits at 187° on the hue wheel with 18% saturation and 36% lightness, which reads as cool.

What is the RGB value of #4b686c?

rgb(75, 104, 108) — 75 red, 104 green and 108 blue out of 255, or 29.4% / 40.8% / 42.4% by channel.

What is #4b686c in HSL and HSV?

hsl(187, 18%, 36%) and hsv(187, 31%, 42%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #4b686c a light or a dark color?

It is a dark color. Relative luminance is 0.1248 and perceived brightness is 38%, so white text on it reaches 6.01:1.

Should I use black or white text on #4b686c?

White. It scores 6.01:1 against #4b686c, versus 3.50:1 for black — AA at any size.

Is #4b686c accessible on a white background?

#4b686c on white scores 6.01:1, which clears AA at every size but not AAA.

What is the complementary color of #4b686c?

#6C4F4B sits directly opposite on the wheel. Softer options are the split-complements #6C4B58 and #6C604B, which give the same contrast with far less vibration.

What colors go well with #4b686c?

For interface work: #F6F8F9 as the surface, #CFDCDE for borders, #5E8287 for secondary text, #70474D as an accent and #34484B for hover and pressed states. For a palette, the analogous pair #4B6C60 and #4B586C stays calm, while #6C4F4B is the loudest partner.

What is #4b686c in CMYK for printing?

cmyk(31%, 4%, 0%, 58%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #4b686c warm or cool?

Cool — it scores 71 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #4B6C64; nudged cooler, #495D6E.

Which Tailwind color is closest to #4b686c?

The gray family — its 500 step is #6b7280, ΔE2000 12.8 away. That is a visible difference, so define #4b686c as a custom token rather than reaching for the built-in.

How do I use #4b686c in Tailwind CSS?

Inline it as an arbitrary value with bg-[#4b686c] or text-[#4b686c], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #4b686c with 50% opacity?

rgba(75, 104, 108, 0.5), or #4b686c80 in eight-digit hex. Over white that composites to #A5B4B6; over black, #263436.

Is #4b686c a web-safe color?

No. The nearest web-safe colour is #336666, ΔE2000 6.3 away. The palette only matters for legacy displays and some email clients now.

What does the color #4b686c mean?

As a cyan, it reads clean, technical, fresh. Cyan reads as water, air and infrastructure: cool, hygienic, engineered. At this moderate chroma the association is present but not shouted.

What gradient works with #4b686c?

The safest is same-hue elevation: linear-gradient(135deg, #648B90, #4b686c 45%, #34484B). For more colour, a short hue run to #3F425A keeps it rich without turning muddy.

Work with #4b686c in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #4b686c at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.